Sony KDL-46HX900 / KDL-46HX903 / KDL-46HX905 / KDL-52HX900 / KDL-52HX903 / KDL-52HX905 Service Manual ▷ View online
KDL-46/52HX900,903,905(AEP/UK)
25
TROUBLE SHOOTING
3-3. NO POWER
No Power
Check STBY 3.3V
at 1 pin of CN3800
on the B* Board
Harness
G* Board
Replace
Between G* Board to
B* Board Harness
B* Board
NG
OK
NG
OK
KDL-46/52HX900,903,905(AEP/UK)
26
1) 2 times blinkings (Main Power Error)
TROUBLE SHOOTING
3-4. STANDBY LED BLINK
2 times Blinkings
Check REG12V at
pins 6/7 of
CN3800 on
the B* Board
B* Board
Harness
G* Board
Replace
Between G* Board to
B* Board Harness
12V NG
12V OK
NG
OK
KDL-46/52HX900,903,905(AEP/UK)
27
TROUBLE SHOOTING
2) 3 times blinkings (DC Alert, Audio Error and Communication Error)
3 times Blinkings
Check D+3.3V at
JL3715 or JL3716
on the B* Board
IC4200,etc
(B* Board)
F3700,IC3700,etc
(B* Board)
Speaker
Check +5V_MAIN
at JL3731 or JL3732 on
the B* Board
Check
Speaker Impedance
at SP Connector
F3701,IC3701,etc
(B* Board)
Check
X_ASW_PROTECT
at pin 29 of IC5000
on the B* Board
Check +12.5V
at pin 2 of
CN3800 on
the B* Board
G* Board
Check +12.5V_AU1
at F4200 on
the B* Board
F4200,IC4200,etc
(B* Board)
IC9000,etc
(B* Board)
DC_ALERT
NG
OK
AUDIO
AUDIO
FE/BE Communication
NG
OK
NG
OK
NG
OK
NG
OK
Pin: Low
Pin: High
KDL-46/52HX900,903,905(AEP/UK)
28
TROUBLE SHOOTING
3) 4 times blinkings (Backlight Driver Communication Error)
4 times Blinkings
Check the harness between the
T-con board and the LED driver board,
between the G board and the
LED driver board.
LED Driver Board
(Panel)
Change the LED driver
board (Panel).
T-con Board
(Panel)
Harness
NG
OK
NG
OK
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